P/N 06160D DCN6409 Teledyne API Model 465M O3 Monitor Instruction Manual - Page 50
8.6. MODBUS Register Maps
8.6.1. Notes on MODBUS registers
Concentration values in the MODBUS registers are always expressed in units of PPB
(parts-per-billion,) regardless of the concentration units setting of the monitor.
8.6.2. Real-Time Concentration and Status Registers
(Read Only)
Decimal
Address Description Register Type Star
t Bit #
Bits
1 Stream Concentration (g/Nm3) Float Inverse 0 32
3 Hi Alarm Status Byte 0 8
3 Hi Hi Alarm Status Byte 8 8
19 Sensor Reference Value Float Inverse 0 32
21 Sensor Measure Value (mV) Float Inverse 0 32
23 Sensor Pressure Value (mV) Float Inverse 0 32
25 Sensor Gas Temperature (K) Float Inverse 0 32
27 Sensor UV Lamp Temperature (oC) Float Inverse 0 32
8.6.3. Instrument Setup and Configuration Registers
(Read / Write)
Decimal
Address Description Register
Type Star
t Bit #
Bits
1030 Hi Alarm Value (PPM) Float Inverse 0 32
1032 Hi Hi Alarm Value (PPM) Float Inverse 0 32
1034 Hi Alarm Enable (PPM) Byte 0 8
1034 Hi Hi Alarm Enable (PPM) Byte 8 8
1035 Alarm Latch Mode Byte 0 8
1038 Analog Range (PPM) Float Inverse 0 32